// file: crates/knowledge-git-api/unit_tests/lib.rs
// version: 2

#[derive(Debug, Eq, PartialEq)]
struct FakeGitError;

struct FakeGitRepository;

impl crate::GitRepository for FakeGitRepository {
    type Error = FakeGitError;

    fn refresh(&mut self, _source_id: &knowledge_domain_lib::SourceId) -> Result<(), Self::Error> {
        return Ok(());
    }

    fn resolve_revision(&self, source_id: &knowledge_domain_lib::SourceId, reference: &crate::GitReference) -> Result<crate::GitRevision, Self::Error> {
        return Ok(crate::GitRevision::new(&format!("{}:{}", source_id.as_str(), reference.as_str())));
    }

    fn prepare_snapshot(&self, _source_id: &knowledge_domain_lib::SourceId, revision: &crate::GitRevision) -> Result<crate::GitSnapshot, Self::Error> {
        return Ok(crate::GitSnapshot::new(revision.clone(), std::path::PathBuf::from("/controlled/snapshot")));
    }
}

#[test]
fn generic_repository_contract_does_not_require_a_forge() {
    let source_result = knowledge_domain_lib::SourceId::new("local-pgr");
    assert!(source_result.is_ok());
    let source_id = match source_result {
        Ok(value) => value,
        Err(_) => return,
    };
    let reference = crate::GitReference::new("refs/heads/master");
    let mut repository = FakeGitRepository;
    assert!(crate::GitRepository::refresh(&mut repository, &source_id).is_ok());
    let revision_result = crate::GitRepository::resolve_revision(&repository, &source_id, &reference);
    assert_eq!(revision_result, Ok(crate::GitRevision::new("local-pgr:refs/heads/master")));
    let revision = match revision_result {
        Ok(value) => value,
        Err(_) => return,
    };
    let snapshot_result = crate::GitRepository::prepare_snapshot(&repository, &source_id, &revision);
    assert_eq!(
        snapshot_result,
        Ok(crate::GitSnapshot::new(revision, std::path::PathBuf::from("/controlled/snapshot")))
    );
    return;
}